1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cf7dd32525393390f61db7dc7896dee346cc9d8de0e9c82d1bd82d4024cd66. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/faa3f021-95f3-4490-9d3b-3f75436e4f18.json and https://artists.proofprofile.net/proofs/artist/faa3f021-95f3-4490-9d3b-3f75436e4f18.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbfe94aaeb9532881424416f5aeb8155685789017b898faedf572af6712421b6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7281746614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3426926c65a7ce585a1bd2dc04e7dfdb35d88eae678e3591701e25d64897431e. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:04:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF069501015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e61aba7b7cbc55beac85c14f67f469549e3f18b9f6d8f3eb0ac8c821515a0a. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:57:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF069600371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686f71b03bd6a5d5eef59e46aca86948aee4574d33b3791509f345c9c8058e86. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF069600373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf06d6e4784fe44129271abb6e9c38f59879f18e896c97804812598478b3f18. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF069800726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddea80b7e28ac0ad374130eb23beac2654bac75af2c0bd1030e77c28ad7f2e4. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:15:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF069800731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cd2d133e54af462b7060cd3c014c6cc0c6df102b08281ccf2b6642d9559eb6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF069900516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5fe73182bcb0defa4bbd6480df17538697c1acbc7b346bd228191254a47912. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF069900518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451008e785a2f26107d709f340618c4bf993eb663e7c4e2dbdaf018b2c3d2189. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:42:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF069900523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5132afb011056db52b0f2b1532d524faac6681e47c056e51be60c448c21b7f34. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF060001601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215b5c43554834ffb857baa677d0043cac5bb62e2cd042ae7c3e5644d30ad9d2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF060001605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1375a5ef44ec6d8285843636a4a5a559dbe0653e19a2c66370b3d0eb6628690c. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF069900515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63b7385b42e9c9b3bd56d04a7d126869f340438788538ee5dc2d4ae71db93e3. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:17:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF069600369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cec5cc45b7fdf658bd29b1d64e765a915b76e7c6e2d7eb8dd9bbf0af179599. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF069600378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bc846566440f2bc25c43f4dda46398b0d43a91f3985c137ea0b6cad1742012. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF069600374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d6ab506db8adb96e525252fe610ef7aacfbe19e7b18266137cb2551bb29d33. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF060001602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69c04fd119b90bff5a07374d0c3195baebcfea5b86cba6a982bc39c598ed6c5. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF1426323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efc43e8762029cc53e78128f115190ef93126888792fc3b2321de186f8b1e3c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF1426328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61323ac17190f45fbc3fcf477f000a6a3de65574efc11dd710d9c8c82ff5f56a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:23:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF1426329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bde864d68a3911472298382a8e5754f84bbeebe97a80ebf0eb430f5f829558a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2527979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ccfd34953b2e17f3dc0aab81bf708c53478ab3e2698c11581893b0a61357cc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2546515.